Compression Techniques

What is lossy compression?

• Data compression method that temporarily removes certain unnecessary or less important information.

• Data compression method that permanently eliminates certain unnecessary or less important information.

• Data compression method that encrypts the data.

• Data compression method that increases the size of the data.

Name one lossy compression algorithm.

• JPEG

• PNG

• GIF

• MP3

What is lossless compression?

• A method of reducing file size by sacrificing some information or quality.

• A method of reducing file size without losing any information or quality.

• A method of reducing file size by compressing the file into a smaller format.

• A method of reducing file size by removing unnecessary data.

Name one lossless compression algorithm.

• Lempel-Ziv-Welch

• Huffman coding

• Run-length encoding

• Arithmetic coding

What is the main difference between lossy and lossless compression?

• Lossless compression is only used for images, while lossy compression is used for videos and audio files.

• Lossy compression reduces file size more than lossless compression.

• Lossy compression permanently removes some data, while lossless compression does not remove any data.

• Lossy compression removes data temporarily, while lossless compression removes data permanently.

What are some advantages of lossy compression?

• Lossy compression improves the quality of the compressed file.

• Lossy compression maintains the same file size as the original uncompressed file.

• Lossy compression is not suitable for multimedia files.

• Lossy compression reduces file size by permanently removing some data that is considered less important or less noticeable to the human eye or ear.

What are some disadvantages of lossy compression?

• Increased file size, Inability to recover original data, Loss of fine details

• Loss of data and reduction in quality

What are some advantages of lossless compression?

• Lossless compression reduces file size significantly.

• Lossless compression allows for exact reconstruction of the original data.

• Lossless compression preserves the original data without any loss of information.

• Lossless compression is widely supported by various file formats.

What are some disadvantages of lossless compression?

• Lossless compression requires more storage space compared to lossy compression.

• Lossless compression takes longer to compress and decompress compared to lossy compression.

• Lossless compression does not achieve as high compression ratios as lossy compression.

• Lossless compression may not be suitable for certain types of data, such as multimedia files.

Which compression technique is more suitable for compressing text files?

• Huffman coding

• Arithmetic coding

• Run-length encoding

• Lempel-Ziv-Welch